因此系统中每个模板的位置可以由它的机架号和槽号来确定。例如，一块模板可以表示为“该模板板在1号机架，第4槽”.这种标号方式使CPU能够正确地读写一-个特定的模板，并能报告故障模板的位置。CPU着板:一种基板在底板电路板上装有CPU (嵌入式CPU)，另-一种基板有一-个槽位用于插入式CPU模板(模块式CPU) .在一个系列90-30PLC系统中只能有一个CPU基板，并且该基板总是称为0号机架。对于模块式CPU基板，CPU模板只能安装在第1槽。
EMERSON U.S. MOTORS C/N A3P2C; M/N BG678 Frame 213 3 HP
OASIS BLF1ARHS WATER COOLER, NNB
UFM UNIVERSAL FLOW MONITORS MN-PPT20GM-16-6?001.0-A0NR-T
HOFFMAN P-KBC8 KEYBOARD COMPARTMENT, NIB
HOFFMAN P-KBC8 KEYBOARD COMPARTMENT, NNB
CHALLENGER 112-LP3 11 kVa DRIVE ISOLATED TRANSFORMER
EMHART WARREN, PK7000A, WELDING GUN, 19′, 6 PIN CONNECT
UNITED ELECTRIC 9311 6BS TEMPERATURE SENSOR, NIB
GENERAL ELECTRIC 75C142444G805 FLEX-A-PLUG BUS PLUG, 20
GENERAL ELECTRIC 428D146G4 FLEX-A-PLUG BUS PLUG, 200 Am
ALLEN BRADLEY 500FL-COD93 LIGHTING CONTACTOR NIB
THOMAS & BETTS 143 1″ LOCKNUT, LOT OF 49, NIB
SIEMENS ITE SENTRON SERIES 400A 600V CIRCUIT BREAKER JD
DANIEL WOODHEAD, 3000 SERIES, MULTIPLE OUTLET BOX, NEMA
ENERPAC SURDL-121 2600LB UPPER FLANGE SWING CYLINDER, N
EMME TECHNOLOGY / MAX AIR UT26-SR4-F07DD, RACK & PIN AC
ENERPAC SLLD201V-30 20KN VITON SWING CLAMP, NIB
